Trunk muscle composition as a predictor of reduced functional capacity in the health, aging and body composition study: the moderating role of back pain. - Hicks GE; Simonsick EM; Harris TB; Newman AB; Weiner DK; Nevitt MA; Tylavsky FA; Hicks, Gregory E; Simonsick, Eleanor M; Harris, Tamara B; Newman, Anne B; Weiner, Debra K; et al. (Journals of Gerontology Series A: Biological Sciences & Medical Sciences, 2005)